Wire loom screw question

[76Datsun280z]

This is a post about something so small, but was curious if your valve covers were the same way as mine. On my valve cover, as you guys know there are three wire looms. On mine, two out of the three screw holes are the same size and the other one is a bigger size, 5/8 I think. I've got two other valve covers and there all the screw holes for the wire looms are the same size so was kind of wondering if mine was made a little differently. Also, if any of you have a spare wire loom lying around and you don't need, let me know I be interesting because you can't seem to buy them individually.

[webdawg1]

I see them on eBay from time to time. Can also get the metal brackets that screw down to the valve cover.

webdawg1